冷气热水器在寒冷气候的地下室中：冷冻？
lifeisgoodsteve|Posted in一般的问题on
Hi All,
I’ve decided to build a small basement for a mechanical room and some storage (happy to have it cold storage too for meat freezer and wine) and wonder how how feasible it is to use a heat pump water heater in a basement in a cold climate?
Would any heat generated from mechanical room be enough to prevent temps going below freezing in winter with heat pump running?
是否建议或值得在地下室中进行辐射地板加热，以防温度太冷或不值得经济上值得？试图将建筑成本肯定符合预算。
如果使用电热水器，机械室的任何热量都可以上升，并在供暖月内增加一些温暖。
Background:
西部蒙大拿州（Bitterroot Valley）
电价在$ 0.068 - $ .076 / kHW（主要是Hydro）之间的便宜
计划在平板中计划的辐射地板热量
谢谢！
steve
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答复
Remember that heat pump water heaters (HPWHs) scavenge heat from their surroundings to heat the water, so they will make the immediate area around themselves colder than it would otherwise be. Any heat scavenged in the winter would likely have originated with your primary heat source too (radiant floor's boiler, etc.), so keep that in mind. Where HPWHs shine is when you can use them in a situation where their slight cooling effect helps you.
Are you in an area with cheap natural gas service? If you're in a cooling dominated climate, natural gas is often more efficient overall in terms of the total energy used to heat the water. If that's not an option for you, or you just want to be all electric, then you'll need to put enough heat into your mechanical space to prevent freezing (I'd recommend keeping the space at a minimum of 50*F). Your HPWH should work fine in that case. I would not expect the other equipment in the mechanical room to keep it warm enough on it's own from just thermal losses in the equipment, and remember that an HPWH makes it COLDER, not WARMER in the space.
账单
嗨,比尔,
谢谢。是的，总的来说，由于HPWH，我会对一个更冷的空间感到满意，因为它可以更好地冷藏肉类冰柜，葡萄酒，蔬菜等。
No natural gas here, so it's electric or propane.
If it would seem that I'd need to heat the space to keep it warm enough not to freeze, then it seems better to simply use an electric water heater.
如果您的选择是电阻热，那么，是的，只要使用常规的电热水器，您就会更好。您不会使用电阻来加热空间，因此HPWH具有清除以加热水的热源。
账单
在冬天的深处，这是事实，这是唯一可能冻结的时间。在今年剩下的时间里，HPWH可以为空间提供冷却和除湿化，这似乎将使该操作受益。
Worst case, it uses the backup resistance heating strips occasionally, at which time you're in the same boat as a resistance heater. The rest of the time, you're better off.
我很惊讶地看到对地下室冻结的担忧。地面基本上是50F大约50F的散热器/源。Zephyr比我更了解，但我认为，如果地面上方的墙壁隔热良好，那就可以了。
In central CO (slightly warmer than the Bitterroot valley, but not much) I have my heat pump in an attached garage/shop. At the coldest, it can be 40F in there. If the basement is big enough you could split it, duct the HPWH and have a cold room and a warmer room, which is what I did.
嗨，布拉德，
That’s what I had been thinking with the ground’s constant temp. Yes, above it would be insulated and heated.
因此，即使在热泵运行的情况下，您的车库也不会低于40？
谢谢，
s
正确，40，HPWH运行，外面零约为零
平均热水使用率约为2000btu/h。使用热泵，其中约有1/3来自电力，其余的来自周围的空间。总体而言，这是一个相当低的负载。根据空间的大小，它会稍微冷却地下室，而冷却量如此之低，这不会太多。
由于它是一个小空间，可以使墙壁隔离，并保持平板没有绝缘。这样，地下土壤可以帮助维持几个程度的空间，远高于冷冻。
If you have an HRV/ERV, you can also put a stale air pickup in this space. This will help in keeping the air down there cleaner and exhaust radon. Since this will draw in warm air from the house above, about a 70CFM pickup will supply enough warm air to cover the heat load of the HPWH, you can tweak the flow rate to get the temperature you want.
谢谢Akos。如果绝缘墙的静态温度足以支撑热泵，而无需额外加热，则除了从一楼拉小空气的备份外，这听起来很有趣。它将是机械室，因此绝对可以在那里进行HRV拾音器。
在Google搜索中找到了这一点。显然，我没有弄清楚如何完善我的GBA搜索以获取我想要的信息。基本上，这是关于地下室温度将使用HPWH降低多少度的讨论。
//m.etiketa4.com/question/how-many-btus-does-a-heat-pump-water-heater-hater-xhuast-exhuast-cool-cool-down-thearea-around-it
Calculating how many degrees a basement will drop from the HPWH is tough unless you do a whole house energy analysis.
假设地下室是从某种爬行空间中切出的。如果该爬网空间是合理的空气密封，没有100年历史的单窗格窗户，并且至少在边缘托梁区域有一些绝缘材料，地下室就不会冻结。HPWH本身不能从这样的大空间中抽出足够的热量。它会更冷，但是如果您正在寻找冷藏库，那不是问题。
如果您爬行空间漏水，那是一个截然不同的故事，因为现在所有的冷空气都会钻进地下室，您只是挖了。
You need to insulate your basement. Unless you have insulation and air sealing between the first floor and the basement, the basement is part of the conditioned space of the house and you're heating it whether you intend to or not.
Heating the basement doesn't really cost you any energy, it just reduces the amount of heat loss through the floor from the first floor. It also makes the first floor more comfortable. And the whole point of heating is comfort.
Most heat pump water heaters won't work below about 50F. In order to extract heat from the air the coil has to be colder than ambient temperature. But if the coil is below 32F ice will form on it and block the flow of air. So around 50F is the lowest practical temperature.
Ge Geospring的最小温度为45